xAiii LIST OF ILLUSTRATIONS 



FIG. PAGE 



124. Egg of Ascaris lumbricoides 240 



125. Ascaris lumbricoides, male and female 240 



126. Heterakis perspicillmn, male and female, and H. vesicularis of poultry. 242 



127. Setaria labiato-papillosa, male and female 245 



128. Gongylonema scutata, anterior and posterior views 247 



129. Dirofilaria immitis, male and female 249 



130. Lung worm of sheep and goat, Dictyocaulus filaria, male, female, and 



eggs 257 



131. Lung worm of sheep, goat, and rabbit, Synthetocaulus rufescens, male 



and female 257 



132. Lung worm of cattle, Dictyocaulus viviparous 259 



133. Lung worm of pig, Metastrongylus apri, male and female 260 



134. Stomach worm of sheep, goat, and cattle, Hsemonchus contortus, 



female 269 



135. Hsemonchus contortus, anterior portion of body 269 



136. Hsemonchus contortus, enlarged posterior extremity of male 269 



137. Cooperia curticei, male and female 270 



138. Cooperia curticei, enlarged anterior portion 270 



139. Ostertagia marshalli, male and female 270 



140. Trichostrongylus instabilis, male and female 271 



141. Ostertagia ostertagi, male and female 273 



142. Ostertagia ostertagi, posterior extremity of male enlarged 273 



143. Nematodirus filicoUis, male and female and enlarged anterior portion . . 274 



144. Cooperia oncophora, male and female 274 



145. (Esophagostomum columbianum, male and female 282 



146. (Esophagostomum columbianum, enlarged anterior portion 282 



147. (Esophagostomum columbianum, enlarged bursa of male 283 



148. (Esophagostomum venulosum, male and female 283 



149. (Esophagostomum venulosum, enlarged anterior portion 283 



150. (Esophagostomum venulosum, enlarged bursa of male 283 



151. (Esophagostomum radiatum, male and female 286 



152. (Esophagostomum radiatum, enlarged anterior portion 286 



153. (Esophagostomum radiatum, enlarged bursa of male 286 



154. Chabertia ovina, male and female 287 



155. Strongylus equinus, male and female 288 



156. Hook-worm of dog and cat, Ankylostoma canina, male and female , . 292 



157. Bunostomum phlebotomum, male and female 293 



158. Tracheal worm of poultry, Syngamus trachealis, male and female . . 294 



159. Dioctophyme renale, male 297 



160. Trichuris ovis, male and female 300 



161. Trichuris ovis, egg 300 



162. Trichinella spiralis, male and female 301 



163. Trichinella spiralis, encysted larva in muscle 302 



